<<How do you guys compare the relative abilities of the two.>>
I own two MFW-15's (and a LOT of other subwoofers) that I use for
testing. If I don't know how they compare, I can't really offer you a
true idea of how my products perform compared to other products.
The Dragon basically has more output at every frequency. At 20 Hz it
is 2-3 dB louder than the MFW-15. Below 20 Hz, the Dragon gradually
increases its advantage because of its sealed design. Because their is
no rolloff below tuning, it has a large advantage in the subsonic realm.
Musically speaking, I don't think there is any contest between the
two. Remember, that I am horribly biased.
The Dragon sounds much
more refined to my ears on movies AND music. Its sealed design gives
it amazing sound quality and it stops on a dime.
However, you have to look at what you are getting. The MFW-15 uses a
15 inch driver with a stamped steel frame and a 2 inch voice coil. The
Dragon utilizes an 18 inch cone with a cast aluminum frame and a 3
inch voice coil. The magnet structure on our 18 is also far larger.
You are also comparing 300/350 watts to 600 watts.
You get what you pay for. A larger amplifier coupled to a huge
subwoofer driver and a much more capable motor are going to make a
difference. It is just physics.
The MFW-15 is a capable subwoofer
as you know, but the Dragon is in another league in regards to output,
sound quality, and subsonic capability.
I hope that this answers your question. Your decision to purchase a
Dragon to replace your MFW-15 definitely makes sense in regards to
output and overall performance.